Define term Federation Entity Keys

[Michael Jones]

We should define the term Federation Entity Keys and use it in places like https://openid.net/specs/openid-connect-federation-1_0.html#section-7.2.2, where we are currently using language like “The keys used by the resolver MUST be the same keys used to construct its Entity Configuration.“

[Michael Jones]

Per the 23-Sep-22 Federation Editors' call, Roland will do this in the same PR that addresses issue

https://bitbucket.org/openid/connect/issues/1633 .

[Giuseppe De Marco]

This issue will be closed by PR 308
https://bitbucket.org/openid/connect/pull-requests/308

[Giuseppe De Marco]

Closed by https://bitbucket.org/openid/connect/pull-requests/308